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Suspension fault C1A20-64 - how to fix
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gruodiz
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Member Since: 16 Nov 2011
Location: Klaipeda
Posts: 273

Lithuania 2006 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3
Suspension fault C1A20-64 - how to fix

I know there are a lot of posts for this problem but I started new topic for the way I solved it.

Here's the way I repaired couple compressors.

If you have "Suspension fault" "Normal height only", yellow suspension light on the instrument cluster and air suspension control switch inoperative, LED's off on the button arrows.

The fault code is

C1A20 64
C1A20-64
C1A2064

Here's what service manual says

Compressor fault
Reservoir pipe air leak
Reservoir air leak
Gallery pipe air leak
Intake filter blocked/restricted
Intake pipe blocked/restricted
Air suspension intake silencer blocked/restricted
Corner valve stuck open
Pressure sensor fault

But the actual problem is the compressor dryer cover crack leak. There're two holes in it for 5mm exhaust pipe and 6mm line to reservoir-gallery. The gap between holes has a micro crack which leaks the air.

To find out the the crack exist you need soap water spray the area there and turn one the engine to start the air compressor automatically pump the air. At first it might look like leaking pipe connectors but the problem is crack.

I have manufaturred couple of these dryer covers in stainless steel and couple in aluminum. Used fast release connectors for pipes.

No need of new compressor, no need of new dryers which is no longer available from Land Rover
RQQ500013, RQQ500014, RQQ500015, RQQ500016, RQQ500020, VUB504700.

Couple of these I've done without removing compressor from the car just removed bottom plastic compressor cover.



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Quote:

This is my first cap really hard and solid which looks like the part from a submarine but works great without any problem
Thumbs Up




How to Do It Yourself DIY

Tools required

-ratchet
-extension
-10mm socket
-T30 socket
-utility knife
-14mm open end wrech
-swivel extension


First of all locate the compressor box under rear left side door, it's a black plastic box. Remove lower compressor box cover, unscrew 3x 10mm bolts and unlcip plastic fasteners.

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Cover removed

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Locate blue and orange connections, crack should be there, use sprayer with soapy water to detect leak and find a crack. Start the engine to run the compressor, if compressor doesn't start lower and raise the vehicle and compressor will run.

When crack detected turn off the engine, disconnect battery negative, disconnect two electrical connections by the compressor to have more room. Disconnect pipes from blue and orange holes by pushing blue, orange rings and pulling the pipes out.

Use T30 to unscrew six caps screws, I recommend to start from the top. Remove the cover, hold it tight, there's a spring behind the cap.

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Cap removed

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Replace red o-ring, put the spring back in place, put new cap in. Use small amount of soap or other lubricant on red o-ring for easier installation.

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New cap in place

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Put quick release joints in finger tight. Use 14mm open end wrench to tight but don't use too much force. Push 5mm pipe to side connection which was in orange before. Use utility knife to shorten 6mm pipe 3cm which was in blue connection before and push in center connection. The quick release joints require to push pipes to the very end and the pull back.

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Connect electric connections, battery negative, run compressor and use soapy water to make sure there's no leak. Put lower cover back in place and you're done Thumbs Up

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Last edited by gruodiz on 13th Jun 2017 7:26 pm. Edited 11 times in total 
Post #117378017th Oct 2013 7:25 pm
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gundogman
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Member Since: 18 Apr 2012
Location: Geordie - exiled in Manchester
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England 2006 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

Wow -clever fix - sounds like it could be just what I am looking for.
Mine has exactly the symptoms you describe.
Any chance I could buy one your 'submarine' covers off you?
  
Post #117378517th Oct 2013 7:32 pm
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D4JWW
 


Member Since: 20 Oct 2009
Location: London, UK
Posts: 1315

South Africa 2009 Discovery 3 TDV6 GS Manual Stornoway GreyDiscovery 3

Thanks for sharing, please explain why the new plate has only on hole not two like the original?
 A few mods... and keeping it all running...Faultmate MSV2
MY09EGR's blanked Thanks Bellautos, BAS 
 
Post #117379217th Oct 2013 7:49 pm
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Robbie
 


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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

That is proper engineering. Top work!

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Post #117379517th Oct 2013 7:51 pm
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gruodiz
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Member Since: 16 Nov 2011
Location: Klaipeda
Posts: 273

Lithuania 2006 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

I expected that question why one hole in stead of two.

No matter where these two pipes connects inside or outside the dryer.

This was the first plate I made, all other others are with two holes due to slightly cheaper connectors than three way connector and 6 to 5 mm adapter.


BTW there was one car with problem as workshop manual says "Reservoir air leak " so if you don't find crack and leak in dryer cap check your reservoir with soapy water as well. Actually reservoir leak sound can be heard with the engine off and in dead silent around. I heard that noise, found the hole when reservoir was still in car. It had a lot of small holes and all rusted so replaced with good used one from RRS/Disco4. Thumbs Up

Reservoir pumped with compressed air from aux compressor





 

Last edited by gruodiz on 26th Sep 2015 6:45 am. Edited 1 time in total 
Post #117381717th Oct 2013 8:17 pm
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tony bennett
 


Member Since: 28 Jul 2005
Location: South West
Posts: 565

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

So has anyone bought one of gruodiz' submarine covers please?
 regards
tony
05 "Battlestar Galactica"
In 7 years ownership
09/13 New Battery (I did that)
11/13 new alternator. (I did that)
2 x EGR Blanked. (I did that ) 
 
Post #118553810th Nov 2013 7:08 pm
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gruodiz
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Member Since: 16 Nov 2011
Location: Klaipeda
Posts: 273

Lithuania 2006 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Not yet Wink
  
Post #118557110th Nov 2013 8:00 pm
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tony bennett
 


Member Since: 28 Jul 2005
Location: South West
Posts: 565

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

Can you give an idea of costs please buddy for when I decide/discover I really need one Very Happy
 regards
tony
05 "Battlestar Galactica"
In 7 years ownership
09/13 New Battery (I did that)
11/13 new alternator. (I did that)
2 x EGR Blanked. (I did that ) 
 
Post #118558210th Nov 2013 8:08 pm
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fjc-land
 


Member Since: 12 Nov 2013
Location: United Kingdom
Posts: 2

United Kingdom 

This sounds & looks just like what i'm after. Mines gone through in that same spot.

Any chance of PM or email on the cost of getting one of these compressor plates.

Many thanks in advance
  
Post #118636712th Nov 2013 9:26 am
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Alan B
 


Member Since: 12 Feb 2013
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Scotland 2007 Discovery 3 TDV6 XS Manual Stornoway GreyDiscovery 3

fjc-land,
If you post another couple of times you can pm him yourself.

Where are you?


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Post #118677812th Nov 2013 9:14 pm
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fjc-land
 


Member Since: 12 Nov 2013
Location: United Kingdom
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United Kingdom 

Cheers Alan B, i'll bear that in mind.

Down in sunny Somerset.

Don't actually need the plate anyway now.

After a bit more research, found that the dryer (which this is) is available seperate from LR for about £70.

Ta anyway
  
Post #118696913th Nov 2013 8:59 am
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S&S_Cars
 


Member Since: 13 Nov 2013
Location: DK
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Denmark 

This was the exact problem in our case. Thanks for the tip! Bow down
  
Post #118720313th Nov 2013 6:11 pm
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Haty
 


Member Since: 05 Dec 2012
Location: Budapest
Posts: 11

Hungary 2005 Discovery 3 TDV6 SE Manual Maya GoldDiscovery 3

Very interested in this modification, find me private. I would like to ask more than one thing!
  
Post #118987319th Nov 2013 1:49 pm
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Haty
 


Member Since: 05 Dec 2012
Location: Budapest
Posts: 11

Hungary 2005 Discovery 3 TDV6 SE Manual Maya GoldDiscovery 3

dear friend, when you can buy your solution? I need more of these. let's talk about the first time in 5 pieces. Price please.
  
Post #119007019th Nov 2013 7:52 pm
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richard.lane
 


Member Since: 06 Dec 2009
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2007 Discovery 3 TDV6 SE Manual Santorini BlackDiscovery 3
Hi, could you let me know the part number please?

fjc-land wrote:
Cheers Alan B, i'll bear that in mind.

Down in sunny Somerset.

Don't actually need the plate anyway now.

After a bit more research, found that the dryer (which this is) is available seperate from LR for about £70.

Ta anyway
  
Post #119150522nd Nov 2013 7:20 pm
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